Earthquake high School Boys Intermediate Skill high Spin 1.6 Kilo 83% Rim Weight Track & Field Discus. Power Series - Blue High school boys intermediate skill level high spin 1.6k track & field discus. Quality backed 2 year warranty. 1.6k 1.6 kilo 1.6 kg 1.6 kilogram high school boys 83% rim weight high spin track & field discus distance rated to 175 feet. 83% Rim Weight is our most popular high school boys 1.6 kilo track & field discus Perfect for Intermediate throwers Power Series - Strength & Durability w/high grade steel rim